US793678A - Water-feed regulator. - Google Patents

Description

No. 793,678. PATENTED JULY 4. 1905. T. G. RAKESTRAW.

WATER FEED REGULATOR.

APPLICATION FILED DBO.22, 1904.

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WZVQW $11 a gi 5 W @a YM NITED STATES Patented July 4, 1905.

PATENT QFFICE.

THOMAS G. RAKESTRAVV, OF DETROIT, MICHIGAN, ASSIGNOR OF TWO-TI-IlRDS TO FREDERICK H. BRANDT AND ELMER WELTON,

OF DETROIT, MICHIGAN.

WATER-FEED REGULATOR.

SPECIFICATION forming part of Letters Patent No. 793,678, dated July 4, 1905.

Application filed December 22,1904. Serial No. 237,895,

To It whom, it may concern:

Be it known that I, THOMAS G. RAKES'IRAW, a citizen of theUnited States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in ater-Feed Regulators for Steam-Boilers; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawing, which forms a part of this specification.

My invention relates to an improvement in water-feed regulators for steam-boilers, shown in the accompanying drawing, and more particularly set forth in the following specification and claims. Y

The drawing shows the water-column of a steam-boiler with my improvement connected therewith by means of which the valve governing the steam-supply to the pump or water to the boiler is controlled.

The object of my invention is to provide an apparatus which will automatically govern the opening and closing of the valve controlling the delivery of water to the boiler or the passage of steam through the steam-pipe to operate the feed-pump.

Referring to the letters of reference shown in the drawing, A is the water-column of a steam-boiler, provided with the usual gagecocks and a gage-glass a.

B is a pipe leading from an opening midway between the upper and lower gage-cocks, being the one usually occupied by the center gage-cock.

B is an elbow from which rises an expansion-tube C, provided at the top with a cap D, closing the end of the tube. Rising from the top of the cap D are cars (l, integral with the cap and forming bearings in which aslotted lever E is pivoted. To the short arm of the lever E is engaged a tie-rod F, its lower end engaging with an ear 6, preferably integral with the elbow B. Engaging the long arm of the lever E is a rod G, provided with a turnbuckle G for adjustment, the other end of the rod engaging a bell-crank lever H, pivoted to an ear 7), formed integral with and projecting from the elbow B. I is a link connection engaging the other armof the bellcrank lever H and connected with the lever L, mounted on the stem of the steam or water valve K.

K is either a water or steam valve, as the case may be. I

L is a suitable relief-valve mounted in the cap at the top of the expansion-tube.

Having set forth the several parts shown in the drawing, I will now describe the operation of the apparatus.

When the water in the boiler drops below the level of the pipe B, steam from the boiler will enter the pipe and passing into the tube C cause it to expand, thereby raising the long arm of the lever E, the short arm being held in a fixed position by the tie-rod F. By lifting the lever E the rod G, connecting the lever E with the bell-crank lever H, operates the latter and by its connection I with the lever J, controlling the steam or water valve K, the valve K is operated and water is permitted to pass to the boiler or steam to the feed-pump to start the latter, thereby delivering water to the boiler.

When the water in the boiler. rises above the level of the pipe B, the steam is cut off from the expansion-tube O and the tube contracting forces the bell-crank lever H down, which in turn by its connection with the lever controlling the valve K cuts off the supply through the latter, thereby automatically controlling the delivery of water to the boiler.

Having thus described my invention, what I claim is- 1. In a water-feed regulator for steam-boilers, a pipe to be connected with the boiler on a line with its predetermined water-level, an expansion-tube rising therefrom and a cap closing its upper end, a lever pivoted thereon, means for holding the short arm of the said lever in a fixed position, a bell-crank lever suitably mounted, a rod connecting the free end of the first-named lever with one of the arms of the bell-crank lever, means for adjusting the length of the same, a valve controlling the water-supply to the boiler, a rod connecting the other arm of the bell-crank lever with the lever governing said valve, and the lever gov-- erning the valve, substantially as described.

2. In a water-feed regulator for steam-boilers, a water-column, a horizontal pipe leading from the water-column on a line with the predetermined Water-level of the boiler, an expansion-tube rising therefrom, a cap closing the upper end of the expansion-tube, a slotted lever pivoted on said cap, means for holding the short arm of the lever in a fixed position, a bell-crank lever suitably mounted, an adjustable rod connecting the free end of the firstnamed lever with one of the arms of the bellcrank lever and the valve-lever, substantially as described.

3. In a water-feed regulator for steam-boilers, the water-column, a horizontal pipe leading from the Water-column on a line with the predetermined water-level of the boiler, an elbow having a screw-thread engagement with the end of the said pipe and provided with projecting lugs, an expansion-tube rising from the elbow, a cap closing the upper end of the eX- pansion-tube and provided with lugs forming a bearing fora lever pivoted thereon, a slotted lever pivoted in said lugs, arod connecting the short arm of the lever with one of the lugs formed on the elbow, a bell-crank lever pivoted to the other lug formed on the elbow, an adjustable rod connecting the long arm of the lever mounted on the expansion-tube with one of the arms of the bell-crank lever, avalvegoverning the Water-supply to the boiler, a lever for operating said valve and link connection between said lever and the other arm of the bell-crank lever, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

THOMAS G. RAKESTRAW. Witnesses:

S. E. THOMAS, F. H. BRANDT.

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